In Synchronet v3.21 and later, the configured New User Info module is executed during Terminal Server new user registrations.
The name of the New User module (by default, newuser_info) is configured in SCFG->System->Loadable Modules->New User Info.
The default exec/newuser_info.js module displays some files and (optionally) prompts for the new user's external message editor and default command shell. The files can be edited or even deleted or renamed if you do not want them displayed:
If you choose to use a customized or entirely different new user info module, it is recommended that you use a different module name (not “newuser_info”) and/or copy the stock new user info module to your mods directory before modifying.